STUDY ON THE SOURCES OF IRRIGATION WATER ON THE GROWTH AND QUALITY OF TOMATO

Abstract

A field experiment was conducted in the horticulture experimental field of Sher-eBangla

Agricultural University to find out the heavy metal concentration on tomato grown by the irrigation water from polluted river, cultivated during Rabi season (October, 2018 to March, 2019). The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Two variety (V -BARI Tomato-14 and V 2 -BARI Tomato-15) and three types of irrigation water (T -Normal water; T 2 -Burigonga river water and T -Shitalokkha river water) were used to conduct the experiment. Thus, the experimental treatments were V 3

1 T (BARI tomato 14 with normal water); V 1 T 2 1 (BARI tomato 14 with Burigonga River water); V (BARI tomato 14 with Shitalokkha River water); V 2 T (BARI tomato 15 with normal water); V 2 T 2 1 (BARI tomato 15 with Burigonga River water); V 2 T (BARI tomato 15 with Shitalokkha River water). The concentration of Cadmium, Lead, Chromium and Nickel in BARI Tomato 14 (V 1 3 ) were 0.159, 0.253, 0.025 and 0.472 mg/kg, respectively; while, its’ were 0.168, 0.259, 0.028 and 0.473 mg/kg respectively, in BARI tomato 15 (V ) and all these concentration in both of the tomato varieties were high than the permissible level of FAO. Though, BARI Tomato absorbed less heavy metal than the BARI Tomato 15. The concentration of Cadmium, Lead, Chromium and Nickel in irrigation water collected from normal irrigation source (T 2 ) were 0.124, 0.137, 0.017 and 0.397 mg/kg, respectively; while, it were 0.188, 0.269, 0.032 and 0.497 mg/kg, respectively in Buriganga river water (T ) and 0.179, 0.364, 0.031 and 0.524 mg/kg, respectively in Sitalakkha river water (T 2 ). The irrigation water collected from Buriganga and Sitalakkha River were statistically similar and higher than the permissible level of FAO. Cd, Cr and Ni were high in the irrigation water collected from the rivers. The highest number of cluster per plant (13.67) was observed in BARI tomato 14 irrigated with normal water (V 3 1 T ) whereas the lowest number of cluster per plant (10.33) was observed in BARI tomato 15 irrigated with normal water (V 2 T 1 1 ). The highest no. of flower per cluster (5.33) was observed in V 1 T but lowest was observed in BARI tomato varieties with all types of irrigation water. Similarly, the highest number of fruit per cluster was also found in V 1 and fruit number per cluster was lowest when both of the varieties were irrigated with Sitalakkha river water. The highest life cycle of tomato plant (114.00 days) was recorded in V 2 T comprised with BARI tomato 15 irrigated with normal water and the lowest cycle was (101.00 days) was found in V 1 1 T comprised with BARI tomato 14 irrigated with Buriganga river water. The harvest duration of tomato was highest (66.00 days) in V 1 T 1 and lowest (46.33 days) in V 2 2 T comprised with BARI tomato 15 irrigated with Sitalakkha river water. The highest number of fruit per tomato plant (42.67) was recorded in V 1 T 1 3 whereas the lowest number of fruit per plant (28.33) was found in V 2 T . Similarly, highest amount of tomato per plant (2.99 kg) was found in V 1 T 1 2 whereas the lowest amount of fruit (2.48 kg) was found in V . Considering the results of the present study and environmental issues it can be concluded that irrigation water is a major factor for tomato cultivation.